6444779 has 4 divisors (see below), whose sum is σ = 7030680. Its totient is φ = 5858880.

The previous prime is 6444733. The next prime is 6444787. The reversal of 6444779 is 9774446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6444779 - 2¹² = 6440683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292934 + ... + 292955.

It is an arithmetic number, because the mean of its divisors is an integer number (1757670).

Almost surely, 2^6444779 is an apocalyptic number.

6444779 is a deficient number, since it is larger than the sum of its proper divisors (585901).

6444779 is a wasteful number, since it uses less digits than its factorization.

6444779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585900.

The product of its digits is 169344, while the sum is 41.

The square root of 6444779 is about 2538.6569283777. The cubic root of 6444779 is about 186.0955592526.

The spelling of 6444779 in words is "six million, four hundred forty-four thousand, seven hundred seventy-nine".